//
// "$Id: Fl_Menu_Window.cxx 10095 2014-02-07 00:09:52Z AlbrechtS $"
//
// Menu window code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

// This is the window type used by Fl_Menu to make the pop-ups.
// It draws in the overlay planes if possible.

// Also here is the implementation of the mouse & keyboard grab,
// which are used so that clicks outside the program's windows
// can be used to dismiss the menus.

#include "fltk_config.h"
#include "Fl.H"
#include "x.H"
#include "fl_draw.H"
#include "Fl_Menu_Window.H"

// WIN32 note: HAVE_OVERLAY is false
#if HAVE_OVERLAY
extern XVisualInfo *fl_find_overlay_visual();
extern XVisualInfo *fl_overlay_visual;
extern Colormap fl_overlay_colormap;
extern unsigned long fl_transparent_pixel;
static GC gc;	// the GC used by all X windows
extern uchar fl_overlay; // changes how fl_color(x) works
#endif

#include <stdio.h>

void Fl_Menu_Window::show()
{
#if HAVE_OVERLAY
	if (!shown() && overlay() && fl_find_overlay_visual()) {
		XInstallColormap(fl_display, fl_overlay_colormap);
		fl_background_pixel = int(fl_transparent_pixel);
		Fl_X::make_xid(this, fl_overlay_visual, fl_overlay_colormap);
		fl_background_pixel = -1;
	} else
#endif
		Fl_Single_Window::show();
}

void Fl_Menu_Window::flush()
{
	if (!shown()) return;
#if HAVE_OVERLAY
	if (!fl_overlay_visual || !overlay()) {
		Fl_Single_Window::flush();
		return;
	}
	Fl_X *myi = Fl_X::i(this);
	fl_window = myi->xid;
	if (!gc) {
		gc = XCreateGC(fl_display, myi->xid, 0, 0);
# if defined(FLTK_USE_CAIRO)
		if(Fl::autolink_context()) Fl::cairo_make_current(gc); // capture gc changes automatically to update the cairo context adequately
# endif
	}
	fl_gc = gc;
	fl_overlay = 1;
	fl_clip_region(myi->region);
	myi->region = 0;
	current_ = this;
	draw();
	fl_overlay = 0;
#else
	Fl_Single_Window::flush();
#endif
}

// Erases the window, does nothing if HAVE_OVERLAY is not defined config.h
void Fl_Menu_Window::erase()
{
#if HAVE_OVERLAY
	if (!gc || !shown()) return;
	//XSetForeground(fl_display, gc, 0);
	//XFillRectangle(fl_display, fl_xid(this), gc, 0, 0, w(), h());
	XClearWindow(fl_display, fl_xid(this));
#endif
}

//
// End of "$Id: Fl_Menu_Window.cxx 10095 2014-02-07 00:09:52Z AlbrechtS $".
//
